Processing Machinery
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LCP Film Fisheyes and Gel Particles
Problem Phenomenon
【Problem Phenomenon】Fisheye-like unmelted gel particles appear in LCP film, affecting optical and barrier properties
Cause Analysis
When melt temperature is uneven or shear is insufficient, high-melting-point micro-regions are not fully plasticized and form gel particles on the film surface; impurities and degradation cross-linked matter also appear as fisheyes; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based solely on experience
Solution
Improve plasticization temperature uniformity and screw mixing ability; strengthen raw material filtration; thoroughly clean during shutdown to prevent degradation cross-linked residue; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Film fisheyes originate from uneven plasticization or degradation residue; temperature uniformity and cleanliness are equally important; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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